package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut()
    {
    }
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行数据填充");
        MethodSignature signature = (MethodSignature)joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0){
            return;
        }
        Object object = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long id = Thread.currentThread().getId();
        if (operationType == OperationType.INSERT){
            try {
                Method createTime = object.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
                Method updateTime = object.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method createUser = object.getClass().getDeclaredMethod("setCreateUser", Long.class);
                Method updateUser = object.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                createTime.invoke(object, now);
                updateTime.invoke(object, now);
                createUser.invoke(object, id);
                updateUser.invoke(object, id);
            }
            catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (operationType == OperationType.UPDATE){
            try {
                Method updateTime = object.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method updateUser = object.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                updateTime.invoke(object, now);
                updateUser.invoke(object, id);
            }
            catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
